Washout plug



Sept. 23 1930. I G. s. TURNER WASHOUT PLUG Filed Aug. 5, 1927 f/WLW l atented Sept. 23, 1930 PATENT oF-FIc seamen 'ivimasjqicmmo;inflame; Assreironro 13.2 mawiylmmimi .00.,orcn1cneo, 1LLmors-,-Aoonronn'rron or ILIfy -Q S g p v I .wAsiioUrfrLUG;

I a plication filed August 5,

j 1 The invention relates to washout plugs for boilers. I I i g In the cleaning of boilers,it is customary to insert and operate scraping or cleaning 5 tools through bushings after the plugs have been removed, to remove the accumulated V frequently occurs that the operator in the insertion of these tools will strike the seatand deform it so'that'thje' joint between'theplug and the bushing will'l eak. v This, in many instances, makes itjne'cessary to replace the 1 bushing or re-face the seat, in orderto pre- 'vent leakage. p. e f. The primary object of the invention is'to provide a washout plug in which provision is made for protecting the seat on the bushg ingagainst deformation by thetools used in cleaning-and washing out the boiler. I p

- Other objects ofthe'inventio-n will appear from the'detailed description.

The invention consists in the several novel 25' features hereinafter set forthand more particularly hereof. a V v i I In the drawing Fig. 1 is a' section of a device embodying the invention. Fig. 2 is a section of the bushing through a pair of the oppositely disposed grooves fort-he applicationof a Wrench toturn the bushing into and out of place in the boiler wall. Fig. 3 is a section illustrating a device embodying a modified formo-f the invention. i I a The invention is exemplified'in a structure comprising-a bushing which is provided at its inner end withan exterior tapered screw thread (hand-a boiler'wall'7 which is suitably threaded to receive the screw-thread 6, sothat' when the bushing isscrewed into the Wall it will be securely held therein against leakage. The bushing is provided with a series of four .notches 8 adjacent its outer end to receive a suitable Wrench or turning tool to facilitate the insertion and removal of the bushing. Outside of the boiler wall, the bushing is formed withan external screw-thread 9 for engagement of Y a 7 corresponding internal screw-thread 10 in a cap or closure plug 11.

defined by claims at the conclusion 1. 27. Serial No. 210,777.

polygonal head 1a to which a Wrench maybe applied to turn the cap into andout of connection with the bushing. An annular groove is formed in the outer end face of the bush ing, and outwardly of the groove it is provided with an annular face 16 for a packing gasket 17 Which is confined and held in an annular groove 18 in the inner face of the cap. The outer end ofthe bushing is projected outwardly, as at 19, beyond the plane of the seat 16; and this projecting portion has an out er cylindrical surface 20 which fits-into ,a cylindrical bore 21 in the cap; i

When the boiler is to be cleaned or washed out, the cap is unscrewed from the bushing,

and the gasket 17 seated in the groove 18 0f the cap willbe removed With the cap! "As the result of projecting the annular portion or outer end of the bushing19 outwardly beyond the plane of the face of the seat the portion 19 serves to protect the seat 16 from injury by any of the tools inserted into the boiler through thebushing. F orexa mplepa workman roughly'directing a tool intot'he boiler is likely to strike the endof'the bushing, and when this occurs, the tool will strike the projecting portion 19 which is not utilized in forming the fluid-tight closure between the bushing and the cap. Thereis suflicient clear ance between the outer end of portion 19 and the cap, so that any deformation, resulting from blows or abrasion fro-m a cleaning tool, will not prevent the cap from being turned so that the gasket 17 will firmly engage the seat 16. This exemplifies a bushing ofawashout plug in which the'seat which is utilized to formthe fiuid tight closure will be protected from deformation or. abrasion likely .tocause leakage of thecontents of the boiler "under high pressure; The cylindrical" bar 21 around the projecting portion 19' serves to guide the cap into its true 'POSltlOIi with respect to thebushing, particularly as the cap, approaches its closed position. f

In the constructionshown in Fig. 3, the bushing is provided in itsouter end with an annular groove 24 and an integral flange 25 adapted-t0 extend around and lap the flange 26 of the cap 27. 'Flange 26 fits into the groove 24 and is provided with an internal screw-thread 27 to engage an external thread 28 on the bushing. The inner end 29 of the groove 2e forms a seat fora packing gasket 30 which is engaged by the inner end of the flange 26 of. the cap to form a fluid-tight con nection betweenthecap and the bushing In this form of the-invention, the" main wall of thebushing and flange 25 both serve to protect the seat 29 and gasket 30 from deforma-' tion by the tools used in cleaning the boiler.

By providing a protective'wall or projec- 7 tion' on the bushing'in both forms of, the invention illustrated, the face or seat on the bushing, utilized informing a fluid-tight closure, is'disposed so that it will not be struck by cleaning tools roughly directed into 7 the bushing or by the tools while they are being reciprocated through the bushing' n able therewith, considerable difliculty has.

been'experienced'i'n removing the worn gasket, because in many instances tools for this I purpose are not available to those engaged, inthe care of-the locomotive. To facilitatethe removalof the worn gasket, a small hole 40 is-drilled through the-cap 12 from theouter face thereof to the base of the groove 18,: sothat a small pin, -nail,-or,-st rip of wire, maybe inserted through the cap from the outsideof the cap, to start a portion of the gasket from the-groove; After a portion has been'removed, the remainder can be easily pulled out of the cap.

.The invention is not to be understood as re-- stricted to the details set forth, since these .may'bem'odified Within the scope of'the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new andv ters Patent isz I I I c. v

I. .Ina washout plug, the combination of.

desire to secure by Leta bushing provided 5 at one end thereof with means whereby it may be securedto a boiler,

wa1l,and havingan external screw-thread at its other end, a cap for closing the bush ing comprisinga cross wall and an annular flangeconnected to the marginal part of the cross wall, said flange being provided with an internal screw-thread for engagement with the external screw-thread of the hushing, saidbushing and capbeing provided with integral coacting annular seats, and a of July, 1927.,

gasket mounted against one of said seats and directly engaged by the other and operative to form a fluid-tight joint between thebushing and cap, the 'bu'shing'having an annular integral portion circumferentially withln and; projecting. beyond its seat to protect said seat'ifrom' injurry by cleaningdevices.

2. In a washout plug, the combination of: V

a bushing provided at oneend thereof with -me'answherebyit may be secured to a boil'er- 1 wall, andhaving-fan external screw-thread at its other end, a cap for :closing the'bushing" comprising a cross wall and an annular flange connected-to. the marginalpart of the cross wall, said'flange being provided with an internal screw-thread for engagement with the eXternalscrew-thread of the bush ing, the said other end of the bushing and the cross wall being; provided with flat and,

integral coacting annular seatstand a gasket mounted agalnst one of said seats and d1- rectly engaged by the other andoperative to form a fluid-tight joint between the bushing: and cap, the bushinghaving anannular in tegral portion of greaterlength than the" gasket positioned ciricumferentially within and projecting beyond its seat and adapted to protect said seat from injury by cleaning devices, the cross wall being recessed inwardly of its seat to accommodate and receive the bushingare in connected-relation;

3. In awashout plug, the combination of a bushing provided at one endthereof with means-whereby it may be secured to a boiler Wall, and-"having an external screw thread at ts-other end, a cap for closing the bushing ,compr'isinga cross wall and an annularfiange connected to them'arglnal part of the'cross wall, said; flange being provided with an in ternal screw-thread for en agement with the external screw-thread of the bushing, the

said otherend of the bushing being provided with integral means forming a flat annular seat, the cross wall of the cap having formed therein an annulargroove, and embodying a-gasket'fitting snugly in the'groove and adapted to engage directly the seat on the,

bushingto' form a fluid-tight joint between the bushing and cap, thebushin'g havinglan annular integralportion cireuniferentially aforesaid annular port-ion when the cap .and

within andprojecting beyondthe-seatto pro-1 Signed at Chicago, Illinois, this 25th day GUILFoRn TURNER;

V tect saidseat from injury byicleaning devices. 

